CODEWITHSUNDEEP
linuxshellcommand-line
footy
footy

Reputation: 5941

How to redirect output back to the display for a single command

In a shell script i have

LOG=/my.log
exec 1>>$LOG
exec 2>&1

which redirects the output in shell script. Now the problem is in the following

LOG=/etc/security/aixpert/log/aixpert.log
exec 1>>$LOG
exec 2>&1

#some codes

print "I want this on cmd output not in log"

#I want rest of the output redirected to log as usual

How can i do this??

Upvotes: 2

Views: 1539

Answers (2)

Fred Foo
Fred Foo

Reputation: 363817

# save stdout as fd 3
exec 3>&1
exec 1>>$LOG
exec 2>&1

echo foo >&3  # output to old stdout
echo bar      # output to logfile

Upvotes: 2

SiegeX
SiegeX

Reputation: 140497

The key is to clone stdout going to the console to an arbitrary fd (I chose 3) before your redirect it to your log. Whenever you want to send output to the console you just redirect fd 1 back to fd 3 with >&3 for that one command

LOG=/etc/security/aixpert/log/aixpert.log

exec 3>&1 >>"$LOG" 2>&1

#some codes

echo "I want this on cmd output not in log" >&3

#I want rest of the output redirected to log as usual

Upvotes: 4

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